#!/usr/bin/env python

# File inspired in https://github.com/indutny/bud

import platform
import os
import subprocess
import sys

version = sys.version_info[0]

if version != 2:
  raise RuntimeError('gyp requires Python 2, but this is Python ' + str(version) + ', ensure your python2 or python command points to the Python 2 executable')

CC = os.environ.get('CC', 'cc')
script_dir = os.path.dirname(__file__)
root = os.path.normpath(os.path.join(script_dir, '..'))
output_dir = os.path.join(os.path.abspath(root), 'out')

sys.path.insert(0, os.path.join(root, 'deps', 'gyp', 'pylib'))
try:
  import gyp
except ImportError:
  print('You need to install gyp in deps/gyp first, run:')
  print('  ./scripts/get_dep.sh gyp')
  sys.exit(42)

def host_arch():
  machine = platform.machine()
  if machine == 'i386': return 'ia32'
  if machine == 'x86_64': return 'x64'
  if machine.startswith('arm'): return 'arm'
  if machine.startswith('mips'): return 'mips'
  return machine  # Return as-is and hope for the best.

def compiler_version():
  proc = subprocess.Popen(CC.split() + ['--version'], stdout=subprocess.PIPE)
  is_clang = 'clang' in proc.communicate()[0].split('\n')[0]
  proc = subprocess.Popen(CC.split() + ['-dumpversion'], stdout=subprocess.PIPE)
  version = proc.communicate()[0].split('.')
  version = map(int, version[:2])
  version = tuple(version)
  return (version, is_clang)

def run_gyp(args):
  rc = gyp.main(args)
  if rc != 0:
    print('Error running GYP')
    sys.exit(rc)

if __name__ == '__main__':
  args = sys.argv[1:]

  # GYP bug.
  # On msvs it will crash if it gets an absolute path.
  # On Mac/make it will crash if it doesn't get an absolute path.
  # NOTE ibc: Not sure that it requires absolute path in Mac/make...
  if sys.platform == 'win32':
    args.append(os.path.join(root, 'mediasoup-worker.gyp'))
    common_fn  = os.path.join(root, 'common.gypi')
    # we force vs 2010 over 2008 which would otherwise be the default for gyp
    if not os.environ.get('GYP_MSVS_VERSION'):
      os.environ['GYP_MSVS_VERSION'] = '2010'
  else:
    args.append(os.path.join(os.path.abspath(root), 'mediasoup-worker.gyp'))
    common_fn  = os.path.join(os.path.abspath(root), 'common.gypi')

  if os.path.exists(common_fn):
    args.extend(['-I', common_fn])

  args.append('--depth=' + root)

  # There's a bug with windows which doesn't allow this feature.
  if sys.platform != 'win32':
    if '-f' not in args:
      args.extend('-f make'.split())
    if 'ninja' not in args:
      args.extend(['-Goutput_dir=' + output_dir])
      args.extend(['--generator-output', output_dir])
    (major, minor), is_clang = compiler_version()
    args.append('-Dgcc_version=%d' % (10 * major + minor))
    args.append('-Dclang=%d' % int(is_clang))

  if not any(a.startswith('-Dhost_arch=') for a in args):
    args.append('-Dhost_arch=%s' % host_arch())

  if not any(a.startswith('-Dtarget_arch=') for a in args):
    args.append('-Dtarget_arch=%s' % host_arch())

  if any(a.startswith('-Dopenssl_fips=') for a in args):
    fips_fn = os.path.join(os.path.abspath(root), 'fips.gypi')
    args.extend(['-I', fips_fn])
  else:
    args.append('-Dopenssl_fips=')

  if 'asan' in args:
    args.append('-Dmediasoup_asan=true')
    args = filter(lambda arg: arg != 'asan', args)
  else:
    args.append('-Dmediasoup_asan=false')

  args.append('-Dnode_byteorder=' + sys.byteorder)

  gyp_args = list(args)
  print(gyp_args)
  run_gyp(gyp_args)
